package com.mwf.gulimall.product.service.impl;

import org.springframework.stereotype.Service;

import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.mwf.common.utils.PageUtils;
import com.mwf.common.utils.Query;

import com.mwf.gulimall.product.dao.CategoryDao;
import com.mwf.gulimall.product.entity.CategoryEntity;
import com.mwf.gulimall.product.service.CategoryService;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> listWithTree() {
        List<CategoryEntity> categoryEntityList = baseMapper.selectList(null);

        List<CategoryEntity> categoryEntities = categoryEntityList.stream().filter(categoryEntity ->
                categoryEntity.getParentCid() == 0).map(menu->{
                    menu.setChildren(getChildrenList(menu,categoryEntityList));
                    return menu;
        }).sorted(Comparator.comparingInt(menu -> (menu.getSort() == null ? 0 : menu.getSort()))).collect(Collectors.toList());
        return categoryEntities;
    }

    @Override
    public void deketeByIds(List<Long> list) {
        baseMapper.deleteBatchIds(list);
    }

    private List<CategoryEntity> getChildrenList(CategoryEntity menu, List<CategoryEntity> categoryEntityList) {
        List<CategoryEntity> categoryEntities = categoryEntityList.stream().filter(categoryEntity ->
                categoryEntity.getParentCid() == menu.getCatId()
        ).map(categoryEntity -> {
            categoryEntity.setChildren(getChildrenList(categoryEntity, categoryEntityList));
            return categoryEntity;
        }).sorted(Comparator.comparingInt(menu2 -> (menu2.getSort() == null ? 0 : menu2.getSort()))).collect(Collectors.toList());
        return categoryEntities;
    }


}